Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. An organic light-emitting display device comprising: an organic light-emitting display panel having a plurality of subpixels connected to data lines and gate lines; a data driver configured to drive the data lines; and a gate driver configured to drive the gate lines, wherein the organic light-emitting display device has a first mode having a first refresh rate and a second mode having a second refresh rate that is lower than the first refresh rate, the second mode having a first period and a second period that is subsequent to the first period, and wherein, in the first period of the second mode, the data driver sequentially supplies data voltages to at least two of the plurality of subpixels, and in the second period of the second mode, the data driver supplies a specific voltage to both of the at least two of the plurality of subpixels to which the data voltages were supplied in the first period of the second mode, the specific voltage being variable based on one of at least two of the data voltages sequentially supplied to the at least two subpixels.
Organic light-emitting display devices are used in various electronic applications, but power consumption and image quality can degrade in low-refresh-rate modes. This invention addresses these issues by implementing a dual-period refresh strategy in a low-power mode. The display includes an organic light-emitting display panel with subpixels connected to data and gate lines, along with data and gate drivers. In a high-refresh-rate mode, the display operates normally. In a low-refresh-rate mode, the display alternates between two periods. During the first period, the data driver supplies data voltages to at least two subpixels sequentially. In the second period, the data driver applies a specific voltage to the same subpixels, where this voltage varies based on the data voltages supplied earlier. This approach reduces power consumption while maintaining image quality by dynamically adjusting the voltage in the second period. The gate driver controls the gate lines to synchronize the subpixel operations. The invention improves efficiency in low-power modes without sacrificing display performance.
2. The organic light emitting display device of claim 1 , wherein the second period of the second mode is a data holding period.
An organic light emitting display device includes a driving transistor and a light emitting element, where the driving transistor operates in a first mode to supply current to the light emitting element and in a second mode to adjust the current. The second mode includes a first period where the driving transistor is turned on and a second period where the driving transistor is turned off. In the second mode, the second period is a data holding period, during which the driving transistor remains off while maintaining the adjusted current level. This configuration allows for stable current control and improved display performance by preventing fluctuations in the driving current during the data holding period. The device may also include a switching transistor to control the connection between the driving transistor and the light emitting element, ensuring precise current regulation. The second mode's operation enhances the accuracy of current supply to the light emitting element, reducing power consumption and improving image quality. The data holding period ensures that the adjusted current level is maintained without additional adjustments, optimizing the display's efficiency and reliability.
3. The organic light emitting display device of claim 1 , wherein the specific voltage is based on the highest voltage among the at least two of the data voltages sequentially supplied to the at least two subpixels in the first period of the second mode.
An organic light emitting display device includes a display panel with subpixels that emit light based on data voltages. The device operates in a first mode for normal display and a second mode for sensing characteristics of the subpixels. In the second mode, data voltages are sequentially supplied to at least two subpixels during a first period, and a specific voltage is determined based on the highest voltage among these data voltages. This specific voltage is then used to drive the subpixels during a second period of the second mode, ensuring accurate sensing of subpixel characteristics. The device may include a voltage generator to provide the data voltages and a timing controller to manage the supply of these voltages. The sensing process helps compensate for variations in subpixel performance, improving display uniformity and accuracy. The invention addresses the challenge of maintaining consistent display quality by dynamically adjusting sensing parameters based on the highest data voltage applied during the sensing phase.
4. The organic light emitting display device of claim 1 , wherein the at least two subpixels have at least one of a first luminance and a second luminance in the second mode, and the first luminance is higher than the second luminance.
An organic light emitting display device includes a plurality of pixels, each pixel comprising at least two subpixels. The display operates in at least two modes: a first mode for normal display operation and a second mode for enhanced brightness or power efficiency. In the second mode, the at least two subpixels within a pixel exhibit different luminance levels, where one subpixel has a first luminance and another has a second luminance, with the first luminance being higher than the second. This luminance differentiation allows for improved display performance, such as higher peak brightness or reduced power consumption, by selectively adjusting the brightness of individual subpixels. The subpixels may correspond to different color channels, such as red, green, and blue, or may represent multiple subpixels of the same color to enhance resolution or brightness control. The device may also include a driving circuit to control the luminance levels of the subpixels in the second mode, ensuring precise brightness adjustments. This configuration enables dynamic adaptation of the display's output based on content or environmental conditions, optimizing visual quality and energy efficiency.
5. The organic light-emitting display device of claim 1 , wherein, while the data driver is supplying the specific voltage to the data lines, the gate driver supplies scanning signals of turn-off level voltages to the gate lines corresponding to the at least two subpixels in the second period of the second mode.
Organic light-emitting display devices are used in various electronic displays, including smartphones, televisions, and digital signage. A common challenge in these displays is achieving uniform brightness and color consistency across the screen, particularly when implementing advanced features like high dynamic range (HDR) or local dimming. One approach to address this involves dynamically adjusting the driving conditions of subpixels to optimize performance. This invention describes an organic light-emitting display device with a data driver and a gate driver that control the voltage and scanning signals supplied to the display's subpixels. The device operates in multiple modes, including a second mode where the data driver provides a specific voltage to the data lines while the gate driver supplies turn-off level voltages to the gate lines of at least two subpixels during a second period. This ensures that the subpixels remain inactive, preventing unintended light emission and improving display uniformity. The technique helps maintain consistent brightness and color accuracy, particularly in high-contrast or high-brightness scenarios. By selectively controlling the subpixels in this manner, the display can achieve better power efficiency and image quality.
6. The organic light-emitting display device of claim 1 , wherein, when the specific voltage is supplied to the data lines, a leakage current is not generated in a switching transistor of at least one subpixel among the at least two subpixels supplied with the specific voltage.
This invention relates to organic light-emitting display devices, specifically addressing the issue of leakage current in switching transistors during voltage supply to data lines. The device includes a display panel with multiple subpixels, each containing a switching transistor and an organic light-emitting diode (OLED). The switching transistor controls the flow of current to the OLED based on a data signal. A key problem in such displays is that when a specific voltage is applied to the data lines, leakage current can occur in the switching transistors of certain subpixels, leading to power inefficiency and reduced display performance. The invention solves this by ensuring that when a specific voltage is supplied to the data lines, no leakage current is generated in the switching transistor of at least one subpixel among the subpixels receiving that voltage. This is achieved through structural or operational modifications to the switching transistor or the subpixel circuit, such as optimized transistor design, improved insulation, or controlled voltage timing. The solution prevents unwanted current flow, enhancing energy efficiency and display accuracy. The invention may also involve additional subpixels or transistors with similar properties to further minimize leakage across the display. The overall effect is a more reliable and power-efficient organic light-emitting display device.
7. The organic light-emitting display device of claim 1 , wherein the specific voltage is the same as one of the at least two of the data voltages sequentially supplied to the at least two subpixels in the first period of the second mode.
Organic light-emitting display devices are used to produce high-quality images by controlling the brightness of subpixels through data voltages. A challenge in such displays is efficiently managing power consumption and ensuring accurate brightness control, particularly when operating in different modes. This invention addresses these issues by optimizing voltage application in a second mode of operation, where the display may operate at lower power or different refresh rates. The invention involves an organic light-emitting display device with a plurality of subpixels, each driven by a data voltage. In a second mode, the device operates in a first period where at least two subpixels receive data voltages sequentially. A specific voltage is applied to a subpixel, and this specific voltage is set to match one of the at least two data voltages supplied to the subpixels during this first period. This ensures consistent brightness control while reducing power consumption by reusing a previously applied voltage. The approach helps maintain display quality while improving efficiency, particularly in scenarios where power savings are critical, such as in portable or battery-powered devices. The invention may also include additional features, such as circuits for generating or selecting the specific voltage, ensuring precise timing and synchronization between subpixels.
8. The organic light-emitting display device of claim 1 , wherein the specific voltage is the same as the one data voltage that is supplied to the last of the at least two subpixels.
Organic light-emitting display devices are used in various electronic displays, including smartphones, televisions, and digital signage. A common challenge in these displays is achieving uniform brightness and color accuracy across multiple subpixels, particularly when different subpixels receive different data voltages. This can lead to inconsistencies in image quality. To address this, an organic light-emitting display device includes at least two subpixels, each receiving a distinct data voltage to control brightness. The device also includes a voltage compensation circuit that applies a specific voltage to a common node shared by the subpixels. This specific voltage is equal to the data voltage supplied to the last subpixel in the sequence. By matching the specific voltage to the last subpixel's data voltage, the circuit ensures that the voltage applied to the common node is consistent with the highest or most recent data voltage, reducing voltage fluctuations and improving display uniformity. This approach helps maintain stable current flow through the subpixels, enhancing brightness and color consistency across the display. The compensation circuit may include transistors and capacitors to regulate the voltage, ensuring precise control over the common node's voltage level. This solution is particularly useful in high-resolution displays where multiple subpixels must operate in synchronization.
9. The organic light-emitting display device of claim 1 , wherein the organic light-emitting display panel displays images or text with at most a specific number of colors in a section of the second mode than the first mode.
The invention relates to an organic light-emitting display device designed to optimize power consumption by adjusting color display capabilities. The device includes an organic light-emitting display panel that operates in at least two modes: a first mode for full-color display and a second mode for reduced-color display. In the second mode, the display panel limits the number of colors used in a specific section of the screen, thereby reducing power consumption while maintaining visibility. The device may also include a power supply unit to provide power to the display panel and a control unit to switch between the first and second modes based on user input or system conditions. The control unit can adjust the display panel's driving conditions, such as voltage or current, to further reduce power consumption in the second mode. The invention aims to extend battery life in portable devices by dynamically adjusting display settings without compromising essential visual information.
10. The organic light emitting display device of claim 1 , wherein the specific voltage differs by a predetermined voltage value from the one of at least two of the data voltages sequentially supplied to the at least two subpixels in the first period of the second mode.
Organic light emitting displays (OLEDs) are used in various electronic devices, but they can suffer from issues such as image retention or afterimages due to differences in driving voltages across subpixels. This invention addresses the problem by adjusting the voltage applied to subpixels during a specific mode of operation to reduce such artifacts. The display device includes a plurality of subpixels, each capable of emitting light based on a data voltage. The device operates in at least two modes: a normal mode for standard display operation and a second mode for mitigating image retention. In the second mode, the device applies a specific voltage to at least two subpixels during a first period, where this specific voltage differs by a predetermined value from the data voltages sequentially supplied to those subpixels. This adjustment helps equalize the driving conditions across subpixels, reducing voltage imbalances that cause afterimages. The predetermined voltage difference ensures that the applied voltage is sufficiently distinct from the data voltages to effectively counteract retention effects while maintaining display performance. The method can be applied to multiple subpixels in sequence, allowing for dynamic compensation during operation. This approach improves display longevity and visual quality by minimizing persistent image artifacts.
11. A driving method for an organic light-emitting display device using a first mode having a first refresh rate and a second mode having a second refresh rate that is lower than the first refresh rate, the second mode having a first period and a second period that is subsequent to the first period, the method comprising: sequentially supplying data voltages to at least two of a plurality of subpixels that are connected to data lines and gate lines in the first period of the second mode; and supplying a specific voltage to both of the at least two of the plurality of subpixels to which the data voltages were supplied in the first period of the second mode, in the second period of the second mode, the specific voltage being variable based one of at least two of the data voltages sequentially supplied to the at least two subpixels.
This invention relates to power-efficient driving methods for organic light-emitting display devices, addressing the challenge of reducing power consumption while maintaining display quality. The method operates in two modes: a first mode with a higher refresh rate for dynamic content and a second mode with a lower refresh rate for static or slowly changing content. In the second mode, the method includes a first period where data voltages are sequentially supplied to at least two subpixels connected to data and gate lines, followed by a second period where a specific voltage is applied to those subpixels. This specific voltage is dynamically adjusted based on the previously supplied data voltages, allowing the display to maintain image quality while reducing power consumption. The method ensures that subpixels receive appropriate voltages to sustain brightness without unnecessary refresh cycles, particularly useful for static images or low-motion scenes. The variable specific voltage compensates for differences in the data voltages applied to the subpixels, preventing image degradation during low-power operation. This approach optimizes power usage by minimizing unnecessary refresh operations while preserving visual fidelity.
12. The method of claim 11 , wherein the second period of the second mode is a data holding period.
A system and method for managing data transmission in a communication network addresses the problem of inefficient data handling during periods of low network activity. The invention provides a multi-mode operation to optimize resource utilization and reduce power consumption. The system operates in a first mode where data is actively transmitted and received, and a second mode where data is temporarily held for later transmission. The second mode includes a data holding period during which incoming data is stored in a buffer rather than immediately processed or transmitted. This holding period allows the system to consolidate data packets, reduce transmission overhead, and minimize energy consumption by avoiding unnecessary processing during idle or low-activity intervals. The system dynamically transitions between modes based on network conditions, user activity, or predefined thresholds to ensure efficient data management. The data holding period in the second mode is particularly useful for applications requiring periodic data updates, such as sensor networks or IoT devices, where continuous transmission is unnecessary. By implementing this method, the system improves energy efficiency, reduces network congestion, and enhances overall performance in communication networks.
13. The method of claim 12 , wherein the specific voltage is based on the highest voltage among the at least two of the data voltages supplied to the at least two subpixels.
A method for driving a display panel with subpixels involves adjusting a common voltage applied to a common electrode based on data voltages supplied to at least two subpixels. The common voltage is set to a specific voltage level that is determined by the highest voltage among the data voltages applied to the subpixels. This ensures that the display panel operates efficiently by minimizing voltage differences and reducing power consumption. The method includes generating the data voltages for the subpixels, determining the highest voltage among them, and adjusting the common voltage accordingly. This approach helps maintain consistent display performance while optimizing power usage, particularly in high-brightness or high-contrast scenarios where voltage variations are more pronounced. The technique is applicable to various display technologies, including liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays, where precise voltage control is critical for image quality and energy efficiency. By dynamically adjusting the common voltage based on the highest data voltage, the method reduces flicker, improves response time, and extends the lifespan of the display components.
14. The method of claim 12 , wherein the at least two subpixels have at least one of a first luminance and a second luminance in the second mode, and the first luminance is higher than the second luminance.
A method for controlling a display device with subpixels operates in at least two modes, including a first mode where all subpixels emit light at a uniform luminance and a second mode where at least two subpixels emit light at different luminance levels. In the second mode, the subpixels may have at least one of a first luminance and a second luminance, with the first luminance being higher than the second. This method allows for dynamic adjustment of subpixel brightness to improve display performance, such as enhancing contrast, reducing power consumption, or achieving higher resolution through subpixel rendering. The technique is particularly useful in high-resolution displays where precise control over individual subpixels is required. By varying luminance levels between subpixels, the display can achieve finer grayscale representation or better color accuracy without increasing the number of physical pixels. The method may be applied in various display technologies, including OLED, LCD, or microLED, where subpixel control is feasible. The approach ensures that the display can switch between uniform and non-uniform luminance modes based on content or user preferences, optimizing both visual quality and energy efficiency.
15. The method of claim 11 , wherein, while the specific voltage is supplied to the data lines, the gate driver supplies scanning signals of turn-off level voltages to the gate lines corresponding to the at least two subpixels in the second period of the second mode.
This invention relates to display driving techniques, specifically for controlling subpixels in a display panel to improve image quality. The problem addressed is the need to selectively activate or deactivate subpixels during display operation to enhance visual performance, such as reducing power consumption or improving color accuracy. The method involves operating a display in different modes, where a first mode is used for normal display operation and a second mode is used for specialized control of subpixels. In the second mode, a specific voltage is applied to data lines connected to at least two subpixels, while scanning signals of turn-off level voltages are supplied to the corresponding gate lines during a second period. This ensures that the subpixels remain deactivated or in a controlled state while the specific voltage is applied, preventing unintended activation. The method may be used to adjust subpixel behavior dynamically, such as for power-saving or color correction purposes. The gate driver controls the timing and voltage levels of the scanning signals to synchronize with the data line voltage application, ensuring precise subpixel control. This approach allows for flexible and efficient management of subpixel states in advanced display systems.
16. The method of claim 11 , wherein, when the specific voltage is supplied to the data lines, a leakage current is not generated in a switching transistor of at least one subpixel among the at least two subpixels supplied with the specific voltage.
This invention relates to display technology, specifically addressing leakage current issues in subpixels of a display panel. The problem occurs when a specific voltage is applied to data lines, causing unintended current flow in switching transistors of subpixels, which degrades display performance. The solution involves a method where, when a specific voltage is supplied to data lines, at least one subpixel among multiple subpixels receiving this voltage does not generate leakage current in its switching transistor. This is achieved by controlling the voltage levels or timing to prevent current leakage in the affected subpixel(s). The method ensures stable operation by maintaining proper transistor behavior, reducing power consumption, and improving display quality. The approach is particularly useful in high-resolution or high-refresh-rate displays where leakage current can significantly impact performance. The invention builds on a broader method of driving a display panel, where data lines are selectively activated to control subpixel behavior, and ensures that leakage current is minimized in at least one subpixel when the specific voltage is applied.
17. The method of claim 11 , wherein the specific voltage is the same as one of the at least two of the data voltages sequentially supplied to the at least two subpixels.
A method for driving a display panel with subpixels involves applying a specific voltage to a subpixel to compensate for voltage differences caused by parasitic capacitance. The method includes sequentially supplying at least two data voltages to at least two subpixels, where each subpixel is connected to a data line and a gate line. The specific voltage applied to a subpixel is the same as one of the at least two data voltages supplied to the subpixels. This ensures that the voltage applied to the subpixel compensates for the parasitic capacitance effect, maintaining accurate display performance. The method may also involve applying a gate signal to the gate line to control the subpixels and adjusting the specific voltage based on the data voltages to minimize voltage differences. The technique is particularly useful in high-resolution displays where parasitic capacitance can distort the display output.
18. The method of claim 11 , wherein the specific voltage is the same as the one data voltage that is supplied to the last of the at least two subpixels.
A method for driving a display panel with subpixels involves applying a specific voltage to a subpixel to compensate for voltage drops in the display. The display includes at least two subpixels, each receiving a data voltage. The method ensures that the specific voltage applied to one subpixel matches the data voltage supplied to the last subpixel in the sequence. This approach helps maintain consistent brightness and color accuracy across the display by accounting for variations in voltage distribution. The technique is particularly useful in high-resolution displays where voltage drops can occur due to resistance in the panel's conductive lines. By matching the specific voltage to the data voltage of the last subpixel, the method compensates for these drops, improving overall display performance. The method may be part of a broader system for driving the display, which includes generating data voltages and controlling the timing of voltage application to the subpixels. This ensures that the display operates efficiently while maintaining image quality.
19. The method of claim 11 , wherein the organic light-emitting display panel displays images or text with at most a specific number of colors in a section of the second mode than the first mode.
An organic light-emitting display panel is used to display images or text in different modes, where the second mode reduces the number of colors displayed in a specific section compared to the first mode. This technique is likely used to conserve power or simplify processing by limiting color depth in certain display regions. The display panel may switch between modes based on user input, content type, or power-saving requirements. The first mode typically supports a full or higher color range, while the second mode restricts colors to a predefined subset, such as grayscale or a limited palette. This approach can be applied to sections of the display, allowing partial color reduction while maintaining full color in other areas. The method may involve dynamically adjusting color output based on detected conditions, such as battery level or ambient lighting, to optimize performance and efficiency. The display panel may also include additional features like touch sensitivity or adaptive brightness control, which could interact with the color mode switching. The invention aims to enhance display flexibility while reducing power consumption or computational load.
20. The method of claim 11 , wherein the specific voltage differs by a predetermined voltage value from the one of at least two of the data voltages sequentially supplied to the at least two subpixels in the first period of the second mode.
A method for driving a display panel with subpixels adjusts voltage levels to improve image quality. The display panel includes subpixels that receive data voltages in different modes. In a first mode, subpixels are driven with a common voltage. In a second mode, subpixels are driven with data voltages in a first period and a common voltage in a second period. The method involves supplying data voltages to at least two subpixels in the first period of the second mode, where the specific voltage for one subpixel differs by a predetermined value from the data voltages of at least two other subpixels. This adjustment compensates for variations in subpixel characteristics, reducing display artifacts like flicker or uneven brightness. The method ensures consistent image quality by dynamically adjusting voltages based on subpixel behavior, particularly in high-resolution or high-refresh-rate displays where voltage inconsistencies are more noticeable. The predetermined voltage difference is calculated to optimize performance without exceeding panel specifications. This approach enhances visual uniformity and reduces power consumption by minimizing unnecessary voltage fluctuations.
Unknown
March 31, 2020
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